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Starrett High-Accuracy Combination Square Blades
![]() | ![]() |
Inch | Inch/Metric |
Use these blades with Starrett High-Accuracy Combination Square Heads. They meet Fed. Spec. GGG-R-791, which establishes uniform standards for accuracy, graduations, and size. Blades are labeled with numeric increments that are less than 1" for quick reading. All have a corrosion-resistant satin chrome-plated finish that reduces glare and wear-resistant etched markings.
Graduation | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Lg. | Front Graduations (Numeric Graduations) | Back Graduations (Numeric Graduations) | Lg. Accuracy | Wd. | Thk. | Color | Color | Type | Each | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Inch | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Satin Chrome-Plated Steel | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
4" | 1/32" (4/32"), 1/64" (8/64") | 1/8" (1"), 1/16" (1") | -0.002" to 0.004" | 5/8" | 1/16" | Silver | Black | Etched | 0000000 | 000000 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
6" | 1/32" (4/32"), 1/64" (8/64") | 1/8" (1"), 1/16" (1") | -0.002" to 0.004" | 3/4" | 5/64" | Silver | Black | Etched | 0000000 | 00000 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
6" | 1/32" (4/32"), 1/64" (8/64") | 1/50" (1/10"), 1/100" (1/10") | -0.002" to 0.004" | 3/4" | 5/64" | Silver | Black | Etched | 0000000 | 00000 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
12" | 1/32" (4/32"), 1/64" (8/64") | 1/8" (1"), 1/16" (1") | -0.0035" to 0.005" | 1" | 3/32" | Silver | Black | Etched | 0000000 | 00000 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
12" | 1/32" (4/32"), 1/64" (8/64") | 1/50" (1/10"), 1/100" (1/10") | -0.0035" to 0.005" | 1" | 3/32" | Silver | Black | Etched | 0000000 | 000000 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
24" | 1/32" (4/32"), 1/64" (8/64") | 1/8" (1"), 1/16" (1") | -0.0035" to 0.007" | 1" | 3/32" | Silver | Black | Etched | 0000000 | 000000 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
24" | 1/32" (4/32"), 1/64" (8/64") | 1/50" (1/10"), 1/100" (1/10") | -0.0035" to 0.007" | 1" | 3/32" | Silver | Black | Etched | 0000000 | 000000 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
36" | 1/32" (4/32"), 1/64" (8/64") | 1/8" (1"), 1/16" (1") | -0.0035" to 0.007" | 1" | 3/32" | Silver | Black | Etched | 0000000 | 000000 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Inch/Metric | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Satin Chrome-Plated Steel | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
11 3/4"/300 mm | 0.5 mm (10 mm), 1/32" (4/32") | 1 mm (10 mm), 1/64" (8/64") | -0.0035" to 0.005"/-0.09 mm to 0.15 mm | 1" | 3/32" | Silver | Black | Etched | 0000000 | 000000 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
23 1/2"/600 mm | 0.5 mm (10 mm), 1/32" (4/32") | 1 mm (10 mm), 1/64" (8/64") | -0.0035" to 0.007"/-0.11 mm to 0.25 mm | 1" | 3/32" | Silver | Black | Etched | 0000000 | 000000 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
High-Accuracy Combination Square Blades
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Blades are for use with High-Accuracy Combination Square Heads. Blades are labeled with numeric increments that are less than 1" for quick-reading. All have a corrosion-resistant satin chrome-plated finish that reduces glare and wear-resistant etched markings.
Graduation | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Lg. | Front Graduations (Numeric Graduations) | Back Graduations (Numeric Graduations) | Lg. Accuracy | Wd. | Thk. | Color | Color | Type | Each | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Inch | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Satin Chrome-Plated Steel | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
6" | 1/32" (4/32"), 1/64" (8/64") | 1/8" (1"), 1/16" (1") | -0.0025" to 0.0025" | 3/4" | 5/64" | Silver | Black | Etched | 00000000 | 000000 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
6" | 1/32" (4/32"), 1/64" (8/64") | 1/50" (1/10"), 1/100" (1/10") | -0.0025" to 0.0025" | 3/4" | 5/64" | Silver | Black | Etched | 00000000 | 00000 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
12" | 1/32" (4/32"), 1/64" (8/64") | 1/8" (1"), 1/16" (1") | -0.0025" to 0.0025" | 1" | 3/32" | Silver | Black | Etched | 00000000 | 00000 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
12" | 1/32" (4/32"), 1/64" (8/64") | 1/50" (1/10"), 1/100" (1/10") | -0.0025" to 0.0025" | 1" | 3/32" | Silver | Black | Etched | 00000000 | 00000 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
18" | 1/32" (4/32"), 1/64" (8/64") | 1/8" (1"), 1/16" (1") | -0.0025" to 0.0025" | 1" | 3/32" | Silver | Black | Etched | 00000000 | 00000 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
18" | 1/32" (4/32"), 1/64" (8/64") | 1/50" (1/10"), 1/100" (1/10") | -0.0025" to 0.0025" | 1" | 3/32" | Silver | Black | Etched | 00000000 | 00000 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
24" | 1/32" (4/32"), 1/64" (8/64") | 1/8" (1"), 1/16" (1") | -0.0025" to 0.0025" | 1" | 3/32" | Silver | Black | Etched | 00000000 | 000000 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
24" | 1/32" (4/32"), 1/64" (8/64") | 1/50" (1/10"), 1/100" (1/10") | -0.0025" to 0.0025" | 1" | 3/32" | Silver | Black | Etched | 00000000 | 000000 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Starrett High-Accuracy Combination Square Heads
Attach to Starrett High-Accuracy Combination Square Blades with the included lockbolts.
Square Heads
![]() |
Square heads check 90° angles.
Cast Iron—Cast iron heads are durable, so they resist dents and scratches. However, they corrode more easily than zinc heads.
Hardened Steel—Hardened steel heads are more durable and last longer than cast iron heads.
Center Heads
![]() |
Center heads identify the center on pipes, rods, and shafts.
Cast Iron—Cast iron heads are durable, so they resist dents and scratches. However, they corrode more easily than zinc heads.
Hardened Steel—Hardened steel heads are more durable and last longer than cast iron heads.
Protractor Heads
![]() |
Protractor heads measure angles.
Cast Iron—Cast iron heads are durable, so they resist dents and scratches. However, they corrode more easily than zinc heads.
High-Accuracy Combination Square Heads
Attach to High-Accuracy Combination Square Blades with the included lockbolts.
Square Heads
![]() |
Square heads check 90° angles.
Zinc—Zinc heads are lightweight and corrosion resistant.
Cast Iron—Cast iron heads are durable, so they resist dents and scratches. However, they corrode more easily than zinc heads.
Hardened Cast Iron—Hardened cast iron heads are more durable and last longer than cast iron heads.
Center Heads
![]() |
Center heads identify the center on pipes, rods, and shafts.
Zinc—Zinc heads are lightweight and corrosion resistant.
Cast Iron—Cast iron heads are durable, so they resist dents and scratches. However, they corrode more easily than zinc heads.
Hardened Cast Iron—Hardened cast iron heads are more durable and last longer than cast iron heads.
Protractor Heads
![]() |
Protractor heads measure angles.
Zinc—Zinc heads are lightweight and corrosion resistant.
Cast Iron—Cast iron heads are durable, so they resist dents and scratches. However, they corrode more easily than zinc heads.